Vaillant ecoTEC 937 actoSTOR - best or worst of both worlds?

[DursleyDonkey]

I've been going round in circles trying to understand the Vaillant range, but I'm now considering the ecoTEC937 with the 15 l hot water store at the back. It occurs to me, however, that keeping this water hot is just like having a hot water cylinder going cold in the airing cupboard, and needing to be topped up all the time. So do you get the issues of a combi as well as the inefficiency of a cylinder, or is the heat loss so small that you get the best of both worlds, not the worst??

 

[Deleted member 105431]

Best of both worlds I think. You should also look at the glow worm XTRAMAX HE although the Vaillant 937 is better quality.